While browsing Youtube I came across this video from Travis at Print Farm Academy. In this video Travis talks about the pitfalls of 3D printing what everyone else is printing. Find your niche.
And it doesn't just apply to 3D printing. CNC, Laser, and many other facets of the maker-realm can all benefit from this advice. What are you good at? What are your hobbies? What can you make that other can enjoy? Even better... what can someone dream up and you bring that to life?
I'm citing that video here:
https://www.youtube.com/watch?v=gGfNkN7IWAA
Thanks, Travis for the video and permission to share it with others.